A capacity of 20,000mAh roughly equates to charging an iPhone 6 about seven times over. For situations where even that isn’t enough — a long road trip or camping journey, for instance — one side of the SolarJuice is covered by a 1.2W monocrystalline solar panel. Eight hours of sunbathing is enough for the battery to recharge your phone to about 50%.

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The power is outputted via two USB ports (1A and 2.1A), which can provide simultaneous charging. The SolarJuice is also waterproof, equipped with an LED flashlight, and capable of lasting for over a thousand cycles.